human 403 Humans 336 male 196 female 191 adult 186 Article 140 Male 136 Female 135 Adult 116 article 110 controlled study 110 procedures 81 Human immunodeficiency virus infection 78 HIV Infections 72 major clinical study 72 middle aged 72 Middle Aged 64 TK Electrical engineering. Electronics Nuclear engineering 57 adolescent 56 nonhuman 56 young adult 55 computer aided design 53 Young Adult 52 psychology 52 Adolescent 49 TA Engineering (General). Civil engineering (General) 49 aged 48 COVID-19 47 QA75 Electronic computers. Computer science 47 TJ Mechanical engineering and machinery 46